20536109 has 12 divisors (see below), whose sum is σ = 22759872. Its totient is φ = 18376200.

The previous prime is 20536091. The next prime is 20536123. The reversal of 20536109 is 90163502.

It is not a de Polignac number, because 20536109 - 2¹⁶ = 20470573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20536909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75644 + ... + 75914.

It is an arithmetic number, because the mean of its divisors is an integer number (1896656).

Almost surely, 2^20536109 is an apocalyptic number.

It is an amenable number.

20536109 is a deficient number, since it is larger than the sum of its proper divisors (2223763).

20536109 is an equidigital number, since it uses as much as digits as its factorization.

20536109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 20536109 is about 4531.6783866466. The cubic root of 20536109 is about 273.8457805136.

The spelling of 20536109 in words is "twenty million, five hundred thirty-six thousand, one hundred nine".